Paddy, a 90-year old Irishman old man gets married to a young girl aged 20 and goes to his doctor for Viagra.
The doctor says "Sorry but giving a man aged 90 Viagra can be dangerous".
Paddy pleads and begs for a Viagra prescription so the doctor gives him a quick once-over medical and says "Okay', though it can only be taken under strict guide lines while on your honetmoon."
The doctor tells Paddy take "Half a dose, skip for a day, half a dose, skip for a day, until you're back from the honeymoon".
After a week the doctor gets a call from Paddy's new wife, who tells the him "Paddy's dead".
The doctor says "I knew if I gave him Viagra it would kill him."
The wife replies,"Oh no, it wasn't the Viagra or sex that killed him, it was all that dammed skipping every day".